How to use xargs with SED in Bash?

How to use xargs with SED in Bash?

The last sed invocation uses the -f switch which accepts the sed commands via a file, the file in this case being the standard input -. N.B. the sed separators | and / should not be a part of some pattern otherwise the regexp will not be formed properly.

How to use some pattern as a sed substitution?

Essentially turn the some pattern into a sed substitution command and feed it via a pipe to another sed invocation. The last sed invocation uses the -f switch which accepts the sed commands via a file, the file in this case being the standard input -.

Why do you use double quotes in xargs?

The double quotes allow for the command substitution to work while preventing spaces from being split. You need to tell xargs what to replace with the -I switch – it doesn’t seem to know about the {} automatically, at least in some versions.

When to use the replacing string in xargs?

When I am using xargs sometimes I do not need to explicitly use the replacing string: In other cases, I want to specify the replacing string in order to do things like: The previous command would move all the text files under the current directory into /foo and it will append the extension bar to all the files.

How to run multiple commands with xargs Stack Overflow?

In the example above, xargs takes echo % as the command argument. But in some cases, I need multiple commands to process the argument instead of one. For example: cat a.txt | xargs -I % {command1; command2;

Is there a way to specify multiple commands in SED?

There are several methods to specify multiple commands in a sed program. Using newlines is most natural when running a sed script from a file (using the -f option). On the command line, all sed commands may be separated by newlines.

How to use sed for multiple ARGs in Linux?

Here is a solution using sed for three arguments, but is limited in that it applies the same transform to each argument: Here’s a method that will work for two args, but allows more flexibility: I stumbled on a similar problem and found a solution which I think is nicer and cleaner than those presented so far.

When to use xargs with the find command?

Combine Xargs with Find Command. It is one of the most important usage of xargs command. When you need to find certain type of files and perform certain actions on them (most popular being the delete action). The xargs command is very effective when we combine with other commands.

How to use xargs with grep in Linux?

The xargs command can be combined with grep command to filter particular files from the search results of the find command. In the following example, find command provided all the .c files as input to xargs.

Do you parse the output of LS or xargs?

Do not parse the output of ls, it’s practically never needed and often breaks something. The input format of the xargs command doesn’t match what any other command produces. Yes, it’s bizarre. With -I, xargs ignores indentation, which is why the file names with initial spaces are mangled.

Is there such a thing as a xargs command?

The ls command doesn’t expand wildcards, it’s the shell that does. Do not parse the output of ls, it’s practically never needed and often breaks something. The input format of the xargs command doesn’t match what any other command produces. Yes, it’s bizarre.